Merge pull request #1987 from IntelPython/add-missing-license-header-sycl-complex

[MAINT] Add missing license header to `elementwise_functions/sycl_complex.hpp`

Author: ndgrigorian

dpctl/tensor/libtensor/include/kernels/elementwise_functions/sycl_complex.hpp

@@ -1,3 +1,29 @@
+//=== sycl_complex.hpp ----------------------------------------  *-C++-*--/===//
+//
+//                      Data Parallel Control (dpctl)
+//
+// Copyright 2020-2025 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+//===---------------------------------------------------------------------===//
+///
+/// \file
+/// This file defines a macro for defining the SYCL_EXT_ONEAPI_COMPLEX macro
+/// and indirect inclusion of the experimental oneAPI SYCL complex extension
+/// header file.
+//===---------------------------------------------------------------------===//
+
 #pragma once
 
 #define SYCL_EXT_ONEAPI_COMPLEX